CN1075842A

CN1075842A - Time base correction in the video recording/playback system

Info

Publication number: CN1075842A
Application number: CN92110179A
Authority: CN
Inventors: 高桢完; 科里斯托夫·H·斯托勒; 艾尔维·R·伯兰玻
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 1992-02-24
Filing date: 1992-08-31
Publication date: 1993-09-01
Anticipated expiration: 2007-08-31
Also published as: CN1046392C; KR0176449B1; MY117260A; EP0557641B1; KR930018555A; ES2110475T3; DE69222289D1; US5412481A; DE69222289T2; JPH05284468A; US5845039A; TW209902B; EP0557641A3; CA2075344C; CA2075344A1; EP0557641A2; MX9204971A; JP2937642B2

Abstract

A kind of writing circuit of recording/playback system comprises brightness and colored subsidiary signal time base corrector, and during the record, the former is convenient to comb filtering, and the latter is used for keeping, and bright/look is followed the tracks of.The playback circuitry of this system also comprises above-mentioned two kinds of time base correctors, playback duration, and the former is convenient to comb filtering, and the latter is used for keeping, and bright/look is followed the tracks of.By suitable switching, record and playback circuitry can be used with a pair of time base corrector.Detector in the writing circuit detects time base error in the vision signal, just only carry out luminance signal comb filtering playback circuitry in spatial domain rather than interframe time domain this is responded, and luminance signal is carried out comb filtering.

Description

Time base correction in the video recording/playback system

The present invention relates to video recording/playback system, particularly in family expenses VCR (VCR) to the correction of time base error.

Recently, along with the development of video signal digital treatment technology, can provide that definition is higher, the family expenses VCR of the image of better quality comes into the market.At a kind of so-called super VHS(S-VHS) improved VHS system in, whole bandwidth of ntsc television signal are recorded in the videocassette on the band-limited magnetic recording media.Then, the image that reproduction quality is improved, definition is very high.

U.S. Patent application No.07/569,029 specification and accompanying drawing are submitted August 17 nineteen ninety by inventor and their partner, exercise question is " a kind of improved video signal recording system ", and transfer (the Samsung Electronics Co.Ltd. of Samsung,) quote U.S. Patent No. 5 now, 113,262 files as a comparison.This system is modified and is used to provide the higher family expenses VCR of a kind of definition, and it is unlike S-VHS family expenses VCR, it can with the VHS system compatible of standard.

U.S. Patent No. 5,113, video signal recording of describing in 262 and playback system have been continued to use standard VHS system in some aspects to owe the process of color format record and playback colour signal.The measure that standard VHS system the process with the colour signal of colored subordinate (color-under) format record of resetting comprises will be in next section description, and these measures have prevented that the time base error in the vision signal (TBE) from causing colour errors.For example, when when another video tape recorder obtains vision signal, owing to reasons such as the variation of playback time belt speed, tape shakes, in the vision signal of record TBE will appear.During writing down, reasons such as the variation of belt speed speed, tape shake also can further cause TBE during owing to record.In the playback procedure afterwards,, still can further cause TBE owing to reasons such as the variation of playback time band, tape shakes.

During the record, the separating color sideband with 3.58MHz compression carrier wave mixes with the 4.21MHz vibration, produces the compound amplitude-modulation sideband of a 629KHz compression carrier wave.Owe in this downward conversion process of colour signal in generation, the burst signal of insertion is mixed, makes frequency drop to 629KHz.The 4.21MHz vibration of adopting in downward conversion is called so-called " maincenter clock signal ", obtains from a phase-locked oscillator (PLO).This PLO comprises a voltage controlled oscillator (VCO), and the frequency of VCO and phase place are controlled by an error signal, and synchronous with a frequency-doubled signal of scanning line frequency.This synchronous in order to realize, VCO is included in the correction feedback ring, wherein VCO provides its vibration to a frequency divider, frequency divider provides a subharmonic of vibration to the frequency plot comparator, the frequency plot comparator is delivered to a loop filter with comparative result, its decision error signal can be connected the speed that reduces by loop, and filter response is sent to VCO, adjust the frequency and the phase place of its vibration, finished the correction feedback ring thus, it adjusts the frequency and the phase place of the vibration that VCO sends, and has reduced error signal.If the filter response time constant is not obviously greater than the line scanning duration, the frequency of 4.21MHz vibration and phase place will change according to the TBE of row in synchronously so.When downconverting to 629KHz, the TBE in TBE in the colour signal and the 4.21MHz vibration subtracts each other, and therefore owing colour carrier does not contain TBE substantially.At playback duration, in up-conversion process, stable 4.21NHz vibration mixes with colored subsidiary signal, produces burst signal and colored sideband, and its 3.58MHz carrier wave does not contain TBE substantially.

At U.S. Patent application No.07/569, video signal recording of describing in 029 and playback system are different from the standard VHS system with colored subordinate format record and playback colour signal, will be pointed out here by inventor and theys' partner.Be used for the downward conversion related and be not to be that the phase-locked simulative generator of 4.21MHz directly produces by frequency of oscillation to the 4.21MHz of up-conversion process sinusoidal signal with colored subsidiary signal.On the contrary, the higher simulative generator of frequency is phase-locked to horizontal synchronizing pulse, and its vibration is counted, so that determine the picture element scan address along every scan line.The picture element scan address is used for the spatio-temporal filtering of digital luminance signal.Then, be stored in sinusoidal wave tracing table in the read-only memory (ROM) by employing, obtaining frequency from the higher oscillator of frequency is the maincenter clock signal of 4.21MHz, and perhaps a subharmonic of those vibrations that obtain by oscillator that stable oscillator and frequency is higher or by frequency division mixes this maincenter clock signal of generation.

U.S. Patent application No.07/569,029 video signal recording of describing and the playback circuitry of playback system comprise a time base corrector (TBC), it is proofreaied and correct the time base error (TBE) of luminance signal at playback duration.TBC represents a kind of device, and the time base error that wherein is included in the vision signal can be eliminated by the memory of a function such as time base buffer.The vision signal that has a TBC according to a synchronous clock signal write memory of this vision signal and TBC in, and read according to a stable clock signal.The unsteadiness of signal is introduced in " TBE " representative by mechanical factor in VCR record and playback system, such as writing down and the belt speed variation of playback duration, tape shake etc.Because TBE is in the output signal of VCR, so this signal is included into non-standard signal by the circuit among the VCR.Digital Signal Processing needs very high time base stability, so that carry out signal processing in time range, the present inventor thinks, when the VCR reception presents enough instable, as to be included into non-standard signal input signal, preferably stops to utilize this treatment technology.

In other words, supposing has one first high definition family expenses VCR, has adopted the bandwidth of frequency folding technology with the luminance signal that reduces to be recorded, its vision signal of resetting, owing to comprise a large amount of TBE in this signal, so be included into non-standard signal; And suppose that this playback of video signal will be by the second high definition family expenses VCR record, this VCR has also adopted the frequency folding technology bandwidth with the luminance signal that reduces to be recorded, so, the unsteadiness that is included in from the video playback signal that a VCR obtains must be before carrying out the three dimensional signal processing, proofreaied and correct as the recording process of the 2nd VCR, three dimensional signal is handled promptly in the time domain of one dimension and the processing in the spatial domain of two dimension.

Such as the professional video tape recorder that is used for television broadcasting, consider the mechanical problem that similarly in undesirable tape motion, occurs for avoiding, winding and capstan mechanism are all better than family expenses VCR.The result of recording process can be monitored by independent playback head.The rotating speed of magnetic drum is controlled by a servomechanism, and this servomechanism carries out negative feedback by frequency between the burst signal that obtains to highly stable this machine of quartz color oscillator with from the playback of video signal and phase error to be realized proofreading and correct.Reducing TBE during the record makes playback duration many easily to the time base correction of vision signal.Yet above-mentioned measure is too expensive, so that can not be used for family expenses VCR.

The time base correction of family expenses VCR is only carried out at playback time in the prior art, and does not comprise the servomechanism of accurate adjustment rotating speed.Need between continuous video sampling, provide time stability the TBE correcting circuit complexity due to the fact that and increased, promptly the signal processing in two-dimensional space territory is to carry out in the zone of vertical direction seven between-line spacings.In other words, owing to need adjust the sampling in the adjacent scan lines simultaneously, realize that the problem of TBE is just complicated so that carry out signal processing in the two-dimensional space territory.Therefore, the correction signal time base stability that obtains from TBE is not enough to carrying out time domain and two-dimensional space territory that high definition handles.Phase-locked oscillator (PLO) circuit is adjusted the timing of TBC input sampling clock, so that it is synchronous with a frequency-doubled signal of line synchronizing signal, this circuit can not be followed the tracks of the error of input signal very tightly, particularly during switching magnetic head and timing error be tending towards the most serious in.The reason that causes tracking problem is because noise; Because it is too big to be used for the time constant of correction feedback ring of control generator frequency and phase place, so that can not interrupt space-filtering operation; Perhaps because playback time feedback loop instability.

One aspect of the present invention is relevant with the family expenses VCR that adopts digital circuit, and in order to carry out signal processing in time range, the signal that is used for writing down that this digital circuit needs VCR to receive has very high time base stability.VCR comprises sorting circuit, is used for unsteadiness is classified greater than specified quantitative and as any signal of non-standard signal, in response to the basic when needed stable high time range of the circuit of this classification Digital Signal Processing is interrupted.

Another aspect of the present invention and a kind of time base corrector simple in structure (TBC), it is applicable in the scope of about seven horizontal scanning lines carries out spatial manipulation and filtering.TBE in the luminance signal adopts one and goes into earlier/go out earlier or early go into/and early going out memory (or FIFO) in brief compresses, and this memory is to write according to any instable write clock signal in the vision signal composition that will write down that can follow arrival accurately, rapidly.FIFO reads according to more stable read clock signal of time, and this signal can be followed the low pass filter that any unsteadiness in the vision signal composition that will write down that arrives is responded.The time constant of low pass filter is about the time that 20 horizontal scanning lines account for.This makes and can realize the time base error correction by ball bearing made using.

Of the present invention relevant with video recording/playback system on the one hand again, wherein time base correction is carried out during writing down.By increase by one with the identical colored subsidiary signal TBC of TBC that supplies with luminance signal, the problem of introducing different time base errors during the record that the TBC by luminance signal is caused between colourity and luminance signal is avoided.

Fig. 1 realizes video recording circuit block diagram of the present invention.

Fig. 2 improves video recording circuit shown in Figure 1 according to a further aspect of the present invention so that improve the improvement circuit block diagram of its performance.

Fig. 3 is the block diagram of a non-standard input detector, this detector determines whether the videograph signal that provides has too many time base error so that be not suitable for carrying out spatio-temporal filtering as a step in the recording process, and this detector is as parts in Fig. 1 and Fig. 2 video recording circuit.

Fig. 4 and Fig. 5 are respectively the block diagram of the alternative that produces 4.21MHz maincenter clock signal in the writing circuit of Fig. 1.

Fig. 6 is used for the block diagram of Fig. 1 according to the playback circuitry of the improved video recording circuit of Fig. 2, and this playback circuitry has realized another aspect of the present invention.

Fig. 7,8 and 9 is respectively the block diagram that produces the device of 4.21MHz stable clock signal in the playback circuitry of Fig. 6.

Figure 10 is the block diagram of prior art circuit, and this circuit responds to bright, the chrominance signal that is reduced by the playback circuitry of Fig. 6, produces the low level TV signal.

Figure 11 is the block diagram of prior art VHS record/playback apparatus, and the circuit of Fig. 1-9 is associated.

With reference to Fig. 1, writing circuit in the video recording/playback system of the present invention comprises the chroma separator 10 of isolating carrier chrominance signal from composite video signal, produce the generator 11 of 4.21MHz maincenter sinusoidal carrier signal, the downward conversion blender 12 that produces colored subsidiary signal according to the carrier chrominance signal of separating and 4.21NHz maincenter sinusoidal carrier signal, the first analog to digital converter 13(ADC1 at composite video signal), the second analog to digital converter 14(ADC2 at colored subsidiary signal), go into/go out earlier (FIFO) memory 15 earlier at first of digitized composite video signal, go into/go out earlier (DIDO) memory 16 earlier at second of digitized colored subsidiary signal, colourity recording processor 17, be used for digital adder 18 that chrominance sideband and motion sideband are lumped together, and the sync separator 19 that horizontal synchronizing pulse and field system chronizing impulse are separated from composite video signal.In conjunction with writing address generator 20 and reading address generator 30.From pushup storage 15, form first time base corrector (TBC1).In conjunction with writing address generator 20 and reading address generator 30, from pushup storage 16, form second time base corrector (TBC2).In addition, writing circuit also comprises a brightness recording processor 40, according to the present invention, this brightness recording processor 40 comprises non-standard input detector 48 and multiplexer 49, be used for when the composite video signal of the preparation record that receives has too much TBE, changing the connection in the brightness recording processor 40.

Writing address generator 20 is first phase-locked loop (PLL1), comprises parts 21-25.The loop time constant that 21 pairs of PLL1 error signals of low pass filter form is τ 1, and this loop time constant τ 1 is slightly larger than the duration of a horizontal scanning line.Under the control of the PLL1 error signal of low pass filter 21 filtering, voltage controlled oscillator 22 under the frequency of the big manyfold of this journey scanning line frequency (for example 640) or near vibration.Oscillator signal control analog to digital converter 13 that sends from VCO22 and 14 sampling timing.Each cycle of the oscillator signal that 23 pairs of oscillators 22 of write address counter send is counted.320 countings of write address counter 23 are by decoder 24 decodings, as delivering to frequency and phase comparator 25 with an input signal.Delivering to second input signal of comparator 25 is made up of the lock-out pulse that separates.Comparator 25 is comparators of general type, the proportional output signal of delay difference between the corresponding sides edge of its generation and first and second signals.Comparator 25 is delivered to low-pass loop filter 21 with its output signal, constitutes closed phase-locked loop pll 1.Because the time constant of loop filter 21 is slightly larger than the duration of a horizontal scanning line, so 1 pair of capable separated synchronizing pulse of phase-locked loop pll responds, rather than the field separated synchronizing pulse responded, and response speed is very fast, is enough to quite accurately follow the time base error in the input signal.

Reading address generator 30 is second phase-locked loop (PLL2), comprises parts 31-35.The loop time constant that 31 pairs of PLL2 error signals of low pass filter form is τ 2, and this loop time constant τ 2 is about 20 times of a line scanning duration.Under the control of the PLL2 error signal of low pass filter 31 filtering, voltage controlled oscillator 32 is under the frequency of the big manyfold (for example 640) than horizontal scanning line frequency or near the vibration frequency.Each cycle of the oscillator signal that 33 pairs of oscillators 32 of read address counter send is counted.0 counting of read address counter 33 is delivered to frequency and phase comparator 35 by decoder 34 decodings as first input signal.Delivering to second input signal of comparator 35 is made up of the lock-out pulse that separates.Comparator 35 is the general types as comparator 25, and it delivers to low-pass loop filter 31 with output, constitutes closed phase-locked loop pll 2.Time constant is about a horizontal scanning line duration 20 times loop filter 31 makes that second phase-locked loop (PLL2) can be synchronous with the field sync signal of input signal, and does not follow the tracks of the quick variation of input signal.

Therefore, the timing that write address counter 23 is followed full tv input signal fast changes, and produce a writing address signal WR simultaneously, writing address generator 20 had both been delivered to a FIFO memory 15 at digitized composite video signal with this signal, delivered to the 2nd FIFO memory 16 at digitized colored subsidiary signal again.Because read address counter 33 is synchronous with the timing of full tv input signal in average very long a period of time, and be not subjected to the influence of tape unsteadiness etc., produce the metastable address signal RD that reads so counter 33 will be the FIFO memory 15 of time base corrector TBC1 and the FIF0 memory 16 of time base corrector TBC2.

Suppose that in

FIF0 memory

15 and 16 each can both store a complete scan line of pixel.Memory be in order to provide their temporary transient memory functions, and the danger of rewriting can not arranged before reading, the write address of delivering to

FIF0 memory

15 and 16 and deliver to

FIF0 memory

15 and 16 read that not occur overlapping phenomenon between the address be very necessary.This can realize by half scan line that makes

decoder

24 and 34 export " 1 " respectively simply.

Eliminate the time base error TBE in the high fdrequency component of composite video signals by the time base corrector TBC1 that forms by FIF0 memory 15 and

address generator

20 and 30, help in brightness recording processor 40, luminance signal being carried out spatial manipulation.Brightness recording processor 40 comprises a suitable luminance signal separator, and it is made up of termporal filter 41, spatial filter 42, motor message detector 43, soft switch 44 and kinematic coefficient generator 45.Termporal filter 41 is at U.S. Patent application No.07/569, is called comb filter in 029, and it comprises the comb filtering that is called " frame pectination " filtering, and it is suitable for stationary part in the serial image rather than motion parts filtering.

Spatial filter 42 is known as comb filter, and it comprises the comb filtering that is called " row pectination " filtering, and it is suitable for motion parts in the serial image rather than stationary part filtering.Kinematic coefficient generator 45 produces and is recorded in by the kinematic coefficient K in read-only memory (ROM) tracing table of the motor message value addressing that detects and (1-K).Soft switch 44 is according to kinematic coefficient K that applies and the output rating of (1-K) determining termporal filter 41 and spatial filter 42.The luminance signal separator, particularly U.S. Patent application No.07/569 that are fit to, the sort of separator of describing in 029, it what follow later is spectrum folding device 46, this folders preferably also is U.S. Patent application No.07/569, that describes in 029 is the sort of.Motion process device 47 will be modulated into four phase carrier waves from the motor message of motor message detector 43, so that produce signal M, this signal is made up of the sideband that falls into the Fukinnki dead space, and staggered with colored subsidiary signal C.Signal C and M deliver to adder 18 as the summation input signal.

Below only those of brightness recording processor 40 are elaborated through the part that improvement has embodied inventive concept.Structure of the present invention and U.S. Patent application No.07/569, the difference of the structure described in 029 is, after the composite video signal that is classified as non-standard input signal by non-standard input detector 48 changes is responded, multiplexer 49 is selected arithmetic value 1, rather than the excursion of selecting to be produced by motion detector 43 is from representing the motor message of nonmotile arithmetic value 0 to the arithmetic value 1 of expression total movement, so that use kinematic coefficient generator 45 and motion process device 47.This make the output valve K of kinematic coefficient generator 45 and (1-K) decision luminance signal L under the situation of non-standard input signal all form by the luma samples that the space is extracted, and needn't consider whether there is motor message.In other words, when detecting a non-standard input signal, mainly handle, so that produce the luminance signal L that transmits as the output signal of brightness recording processor 40 in spatial domain from the time base correction digital signal that FIF0 memory 15 obtains.

Non-standard input signal detection device 48 produces a control signal, and it is not that " 1 " is exactly " 0 ", and this depends on whether input signal is a non-standard signal that comprises TBE.Suppose that non-standard input detector 48 shown in Figure 1 is such one type, it is by the write address WR of definite write address counter 23 outputs and reading the difference between the RD of address and determining whether the vision signal of current input is that a non-standard signal detects unsteadiness of read address counter 33 outputs.A specific embodiment of such non-standard input signal detection device describes in further detail with reference to Fig. 4.Nonstandard signal detector 48 is not limited to this particular type, nonstandard signal detector textural whole needs that will satisfy be it whether can detect current input signal be a non-standard signal that comprises TBE.

Do not draw among remainder Fig. 1 of writing circuit, but they and U.S. Patent application No.07/569, that describes in 029 is similar.Luminance signal L converts analog form to from digital form, and is used for a FM carrier wave is carried out frequency modulation(FM).The output signal C+M of adder 18 converts analog form to from digital form, and is added on the FM carrier wave.Utilize then that volumetric scan will finally obtain with signal record on magnetic recording media.

In colour signal writing circuit of the present invention, down-converter 12 receives the 4.21MHz maincenter output signal that generator 11 produces, so that during the downward conversion of carrier chrominance signal, TBE appears in the final colored subsidiary signal.Introduce TBE in the final colored subsidiary signal corresponding to the TBE the sampling clock of carrying from analog to digital converter 14.If the stabilizing clock reclocking that the digital sampling basis of carrying from analog to digital converter 14 occurs regularly, they will not contain TBE with respect to colored subordinate carrier frequency so.Therefore at playback duration, having can reducing to up conversion of a stabilizing clock does not have the carrier chrominance signal of obvious errors in the colour subcarrier phase place.Except 4.21MHz maincenter carrier wave produced by different way, the way in all the other and the prior art was similar.In prior art, luminance signal is not carried out time base correction during the record, as can cause different TBE between luminance and chrominance information, this will produce the problem aspect bright/look tracking at playback duration.Owing in recording process, luminance signal is not carried out digitized processing, and carries out digital filtering then, so luminance signal is carried out time base correction with regard to not needing.In prior art, the ensuing process of playback duration is by colored subsidiary signal is carried out to up conversion this colour subsidiary signal with carry sinusoidal wave mixing of stable 4.21MHz of coming from a quartz (controlled) oscillator, therefore is a composite video signal reduction chrominance sideband that is transported to VHF television channel modulator.Because 4.21MHz is sinusoidal wave and the carrier wave of colored subsidiary signal in do not contain TBE, so the 3.58MHz subcarrier of the reduction that occurs during burst signal does not contain TBE yet, this helps this machine color oscillator synchronous in the color TV set.Unlikely being exceeded of lock in range on synchronization of the AFPC ring of this machine color oscillator.

In video tape recorder, during recording process, particularly be in when horizontal when digital filtering, luminance signal is digitized, and carries out digital filtering then, and such video tape recorder is that the present invention is concerned about, in order to carry out digital filtering, need carry out time base correction to luminance signal.Consider the frequency of subordinate carrier wave,, produce colored subsidiary signal by adopting the 4.21MHz carrier chrominance signal for TBE is proofreaied and correct.Yet, consider the modulation function of colored subsidiary signal, in this process, do not proofread and correct TBE.Because luminance signal is through time base correction, the modulation function of colored subsidiary signal does not then have, so exist final different time base error between monochrome information in the L signal of being carried by analog to digital converter 14 and the chrominance information in the digitized colored subsidiary signal.This follows the tracks of the bright/look on the screen during the vision signal of playback of recorded is a kind of obstacle.

Can clear away the obstacle that bright/look is followed the tracks of according to an aspect of the present invention, Here it is carries out time base correction to the digitized colored subsidiary signal of being carried by ADC14, and this is corresponding to the digitized luminance signal of being carried by ADC13 is carried out time base correction.Time base correction to digitized colored subsidiary signal is finished by FIF0 memory 16, and it is the read address of the write address of the FIF0 memory 15 that receives as it.Comprise that the adverse effect that this machine color oscillator of time base corrector TBC2 in video replay band, color TV set of

parts

16,20 and 30 causes when synchronous is compensated in playback circuitry, this further explains when describing Fig. 6 in detail.

Carrier chrominance signal through the digitized colored subsidiary signal of time base correction is delivered to colourity recording processor 17 from FIF0 memory 16.17 restrictions of colourity recording processor are in response to the image of input carrier chrominance signal, filtering is disturbed in playing a reversed role of being intended to prevent to crosstalk in the Fukinnki dead space, this dead space is to be occupied by the motor message M that carries from motion process device 47, and then the carrier chrominance signal C that will obtain at last is as an input signal transmission of adder 18.

Fig. 2 represents an improved brightness recording processor 400, can replace the brightness recording processor 40 in the writing circuit of Fig. 1, and it also comprises parts 401-404 except the parts 41-49 that comprises processor 40.400 pairs of brightness recording processors are recording, and quiltization the input signal that is classified as non-standard signal respond, the motor message M that setting is transported to adder 18 is zero.Be classified as the input signal of non-standard signal according to change, the motor message M that preferably is transported to adder 18 is set to total head, as the way in the writing circuit of Fig. 1, this is because when motor message is total head, often presents some undesirable crosstalking in colored subsidiary signal C.Yet, some other approach of this process need indication video tape playback circuitry, the vision signal of record is a non-standard signal, only requires in the two-dimensional space territory rather than is handling in the time-domain of frame based on CY to CY or frame.

The motor message M that multiplexer 401 is used for selectively motion process device 47 being sent passes to adder 18, the video input signals that is used to write down that will receive when non-standard input signal detection device 48 incorporates into to standard signal or when not containing TBE substantially, just carries a logical zero to multiplexer 401.The video input signals that is used to write down that will receive when non-standard input signal detection device 48 incorporates into into non-standard signal and when multiplexer 401 is carried a logical one, multiplexer 401 has selection to carry arithmetic value 0 to adder 18, rather than the motor message M that carries motion process device 47 to send.

402 pairs of output signals of sending from non-standard input detector 48 for " 1 " of ID signal generator respond, and produce with a known method and can discern the ID sign indicating number that input signal is a non-standard signal.For example, when a non-standard video signal will be recorded, the ID sign indicating number can be a continuous pseudo noise pulse train.The output signal of multiplexer 403 receiving folding devices 46 and the output signal of ID signal generator 402 are as input signal, and the state of the control signal of carrying from strobe generator 404 responded, from these signals, select one then as its output mode signal.404 pairs of field sync signals of strobe generator respond, produce a gating signal, this signal is given the control signal of multiplexer 403 as its state of decision, so that at field blanking interval or be right after duration of live part of scan line of the regulation of field blanking interval, select ID sign indicating number input signal as its output mode signal.Multiplexer 403 is carried time-division multiplex transmission brightness and ID signal L+ID to the remainder of the writing circuit of conventional structure.

The structure that Fig. 3 has at length drawn non-standard input signal detection device 48.Digital adder 481 is with half of 640 pixels of bisection 320(in a scan line) with read the address addition from counter 33, produce a signal, do not having under the situation of TBE, this signal should equal from the write address of counter 23, utilize digital subtractor 482 then, with this signal with subtract each other from the write address of counter 23.Subtracter 482 is delivered to a digital averaging value filtering device 483 that many samplings are averaged with difference signal.Its output signal is the input signal of

absolute value circuit

484, and 484 pairs of these mean values of absolute value circuit carry out rectification.The output signal of absolute value circuit 484 is delivered to threshold dector 485, and it is made of a digital comparator generally speaking.When the output signal of absolute value circuit 484 has surpassed a setting, threshold dector 485 output logics " 1 ", the video input signalsization that is used to write down that its expression receives is classified as non-standard signal.If the output signal of absolute value circuit 484 does not surpass a setting, threshold dector 485 output logics " 0 " so, the video input signalsization that is used to write down that its expression receives is classified as standard signal.

Fig. 4 represents to produce a kind of method of 4.21MHz maincenter clock signal, the phase-locked loop pll 1 in writing address generator 20, no longer needs other phase-locked loop.Write address counter 23 has drawn in more detail and, and it is made up of level Four binary counter 231, and it is to being sent to the 10.1MHz vibration counting of input (CI) from VCO22, and at its 629KHz square wave of output (CO) generation.The 629KHz square wave counting that is sent to input (CI) that 232 pairs of outputs from level Four binary counter 231 of six grades of binary counters (CO) come, 233 pairs of counters 231 of decoder and 232 mixing counting respond, and mix counting and are reset to 0000000000 when mixing to make after counting reaches 1001111111.

The maincenter clock-signal generator 11 that drawn in more detail among the figure, it comprises amplifier 111, quartz (controlled) oscillator 112, counter 113, phase shifter able to programme 114 and to up conversion blender 115.The 629KHz square wave that amplifier 111 receives as its input from counter 231; Quartz (controlled) oscillator 112 produces a highly stable 3.58MHz sine wave; 113 pairs of horizontal scanning lines of counter are pressed mould four countings, and phase shifter 114 able to programme is pressed 90 ° of steppings to the sinusoidal wave phase shift of 3.58MHz according to mould four countings; Send and the 629KHz output signal frequency sum of and amplifier 111 through amplify sinusoidal wave through the 3.58MHz of phase shift responds from phase shifter 114 to 115 pairs in up conversion blender, produce 4.21MHz maincenter clock frequency, the signal at end is called " maincenter signal ", and its reason is that the timeconstant 1 of phase-locked loop pll 1 is very little.

Adopt phase shifter 114 able to programme to be because during video signal recording, 90 ° increment phase shift is arranged to 4.21MHz signal next bar from a horizontal scanning line.This just makes during video signal recording from 629KHz signal between next bar of horizontal scanning line desired 90 ° increment phase shift is arranged.Illustrate: phase shifter 114 able to programme can comprise branch's analog delay line, be used to provide the 3.58MHz sine wave of 0 °, 90 °, 180 ° and 270 ° phase place, can also comprise multiplexer, be used for each mould four counting, a output signal in four phase places of selection 3.58MHz sine wave as phase-shifter able to programme according to scan line.

Fig. 5 represents to produce the another kind of method of 4.21MHz maincenter clock signal, the phase-locked loop pll 1 in writing address generator 20, no longer needs other phase-locked loop.4.21MHz the maincenter clock signal can adopt storage read-only memory 117 sinusoidal wave and the cosine wave tracing table to produce, and according to mould four countings of horizontal scanning line, selects a suitable table to read.Owing to during video signal recording, to 4.21MHz signal next bar 90 ° phase shift is arranged from a horizontal scanning line, so carry out on the basis of four scanning line periods from the supposition that searches of sin/cos table.Digital to analog converter 118 will become analog form from the conversion of signals that ROM117 reads, and flow to the downward conversion blender 12 in Fig. 1 or 2.

The technical staff that the ROM tracing table is familiar with as can be seen, not the ROM117 that utilizes two full scan lines of the sinusoidal wave and cosine wave of storage 4.21MHz, but the storage requirement of the similitude minimizing ROM of base phase place difference can utilize the symmetry of two scan lines of these functions and these two functions to remove the time.Three significance bits of 12 write addresses can be used for controlling nine invalid bits revising 12 write addresses, so that produce the address of 1/2nd ROM of a scan line of storage 4.21MHz sine/cosine function, and the negative signal of control ROM output signal selection, purpose is every scan line is produced the correct 4.21MHz carrier wave of phase place.In claim of the present invention, the structure of this conversion is all thought in the scope of " read-only memory ".

In Figure 4 and 5, the counting input signal that resets and be used as scan line counter 113 of write address counter 23, for purposes of the present invention, this counter only needs a secondary binary counter, is used for continuous horizontal scanning line by mould four countings.Yet for other purpose, can adopt multistage binary counter 113, the higher counting of continuous sweep line or two/one scan line is used to add up, two needed scan line mould four countings that can be used to provide the control that is used for Fig. 4 phase shifter 114 able to programme of the output signal of this counter 113, and needed scan line mould four countings that are used for the ROM addressing of giving storage 4.21MHz sin/cos tracing table of Fig. 5.This multistage binary counter 113 should be to the horizontal scanning line counting in two frame periods, and therefore mould four countings to continuous horizontal scanning line can normally carry out.

The playback circuitry of Fig. 6 receives a time-division multiplex transmission signals L+ID who reduces from recording medium according to the method for going back original luminance signal of prior art, and receives a colored subsidiary signal C+M to colourity and motor message C+M coding that reduces from recording medium according to the method for going back the original color subsidiary signal of prior art.Analog signal L+ID and C+M convert digital signal to by the 3rd analog to digital converter (ADC3) 513 and the 4th analog to digital converter (ADC4) 514 respectively, and these two analog to digital converters are structurally similar with second analog to digital converter (ADC2) 14 with first analog to digital converter (ADC1) 13.Digital signal L+ID delivers to the 3rd time base corrector 515(TBC3), its structure and the first time base corrector 15(TBC1) similar.Digital signal C+M delivers to the 4th time base corrector 516(TBC4), its structure and the second time base corrector 16(TBC2) similar.Therefore, can provide the switching device shifter (not shown), utilize parts 13-16 as parts 513-516 at playback time, and parts 513-516 needn't be set separately.

The brightness reproducing circuit comprises the 3rd analog to digital converter 513(ADC3), the 3rd time base corrector 515(TBC3), brightness replay processor 540, ID signal detector 550, and multiplexer 551.By suitable switching device shifter (not shown), during can utilizing record, playback duration brightness replay processor 540 is used for those parts of brightness recording processor 40.The brightness of 513 pairs of reproductions of ADC3 and ID signal L+ID carry out digitlization, and 515 pairs of digital signals that obtain of TBC3 are carried out TBE and proofreaied and correct.By the ID signal of detection record, ID signal detector 550 differentiates whether a field brightness signal that will reappear is a non-standard signal.And if if the luminance signal of only reappearing be a non-standard signal, ID signal detector 550 produces a control signal so, decision multiplexer 551 provides the total head of the motor message M of arithmetic value 1(supposition to brightness replay processor 540), make processor 540 only produce an output signal L by spatial manipulation.

Brightness replay processor 540 comprises spreader 546, it is by (operating position of this preemphasis is at U.S. Patent application No.07/569 to original frequency with to its higher frequency preemphasis that postemphasises with the frequency spread of the luminance signal of bandwidth reduction, specific descriptions are arranged in 029) recover the luminance signal of bandwidth reduction, processor 540 also comprises the termporal filter 541 and the spatial filter 542 of the sideband that is used to eliminate folding carrier wave and unwanted picture, the wave excluder 543 of making an uproar that when the signal that reappears by the VHS system log (SYSLOG) of routine, is used to improve picture quality, soft switch 544, kinematic coefficient generator 545, and multiplexer 547.Mode selects signal can determine from the kind of the vision signal of magnetic tape reproducing, promptly is the common VHS system or the system of bandwidth reduction.Pass-through mode is selected signal, and multiplexer 547 selects to impose on as input signal the output of a conduct oneself in the output signal of its soft switch 544 and the wave excluder 543 of making an uproar.The input signal of 545 pairs of ID signal detectors 550 of kinematic coefficient generator responds, and carries out the such operation of kinematic coefficient generator 45 in the brightness recording processor 400 as the aforementioned.

The color rendering circuit comprises the 4th analog to digital converter 514(ADC4), the 4th time base corrector 516(TBC4), motion/chroma separator 517, the 4.21MHz carrier generator 519 of digital to analog converter 518, four phase stabilizations and up-converter 520.The motion and the carrier chrominance signal of 514 pairs of reproductions of ADC4 are carried out digitlization, and the digital signal of 516 pairs of return periods of TBC4 is carried out TBE and proofreaied and correct.Motion/chroma separator 517 disengaging movement signal and carrier chrominance signals, and motor message delivered to multiplexer 551, be applied to kinematic coefficient generator 545 selectively.The carrier chrominance signal of separating converts analog form to through digital to analog converter 518, deliver to up-converter 520 as input signal, according to one that provides by 4.21MHz carrier generator 519 stable 4.2MHz clock signal, frequency is upwards become 3.58MH. from 629KHz.During video frequency signal replay, to follow from a horizontal scanning line to phase change next bar, generator 519 provides the 4.21MHz clock signal of one four phase stabilization.Phase shift from a horizontal scanning line to the colored subordinate carrier wave of 629KHz next bar during these phase shifts and the video frequency signal replay mixes, so these phase shifts are from having cancelled to the 3.58MHz chrominance sideband of the reduction of up conversion blender 520 conveyings.Therefore, the variation in the ranks that in the ranks changes in the carrier wave phasing with the 3.58MHz chrominance sideband of the composite signal that is used for writing down of initial delivery the carrier wave phasing of the 3.58MHz chrominance sideband of the reduction of carrying from blender 520 repeats.

Signal L with the brightness of carrying from multiplexer 547 circuit of 3.58MHz chrominance sideband Fig. 6 after of the reduction of carrying from blender 520 superposes.Usually before this stack step that produces composite video signal, also has filter step.This composite video signal adds the sound carrier of modulation, is used to modulate a low level radio-frequency carrier then.Modulated radio-frequency carrier is applicable to color TV set.

A kind of form that stable 4.21MHz generator 519 in Fig. 7 presentation graphs 6 can be taked, the time base corrector TBC4 that supposing resets adopts is used for the identical reading address generator 30 of time base corrector TBC2 when utilizing record.Reading address generator 30 comprises read address counter 33.Read address counter 33 has drawn in more detail and, and it is made up of level Four binary counter 331, and it is to being sent to the 10.1MHz vibration counting of input (CI) from VCO32, and at its 629KHz square wave of output (CO) generation.The 629KHz square wave counting that is sent to input (CI) that 332 pairs of outputs from level Four binary counter 331 of six grades of binary counters (CO) come, 333 pairs of counters 331 of decoder and 332 mixing counting respond, and mix counting and are reset to 000000000 when mixing to make after counting reaches 1001111111.

The 4.21MHz stable clock of having drawn in more detail among figure signal generator 60, it comprises amplifier 61, quartz (controlled) oscillator 62, counter 63, phase shifter able to programme 64 and to up conversion blender 65.The 629KHz square wave that amplifier 61 receives as its input from counter 331; Quartz (controlled) oscillator 62 produces a highly stable 3.58MHz sine wave; 63 pairs of horizontal scanning lines of counter are pressed mould four countings, and phase shifter 64 able to programme is pressed 90 ° of steppings to the sinusoidal wave phase shift of 3.58MHz according to mould four countings; The 3.58MHz through phase shift that sends from phase shifter 64 to 65 pairs in up conversion blender is sinusoidal wave and respond through the 629KHz of amplifier 61 output signal frequency sum, produce 4.21MHz stable clock frequency, because the length of the timeconstant 2 of phase-locked loop pll 2, the signal at end is called " stable signal ".Phase shifter 64 able to programme is used to be introduced in during the video frequency signal replay, phase shift from a horizontal scanning line to 4.21MHz stable clock signal next bar, these phase shifts mix with phase shift from a horizontal scanning line to the colored subordinate carrier wave of 629KHz next bar, as during videograph, occurring, so these phase shifts are in compensation mutually in up conversion blender 520 output signals.

The another kind of form that stable 4.21MHz generator 519 in Fig. 8 presentation graphs 6 can be taked supposes that once more the time base corrector TBC4 that playback time adopts utilizes the identical reading address generator 30 that is used for time base corrector TBC2 when writing down.The supposition of the structure of read address counter 33 is basically with shown in Figure 7 identical.Scan line counting along 63 structure supposition also basically with shown in Figure 7 identical.Sinusoidal wave and the cosine wave tracing tables of read-only memory 67 storage, digital to analog converter 68 will become analog form from the conversion of signals that ROM67 reads, flow among Fig. 6 to up conversion blender 520.Table among the ROM67 is read by Continuous Selection, and this selection is to count according to the mould four of the horizontal scanning line of carrying from scan line counter 63 to carry out.This selection is introduced in during the video frequency signal replay, phase shift from a horizontal scanning line to 4.21MHz stable clock signal next bar, these phase shifts mix with the phase shift of a horizontal scanning line to the colored subordinate carrier wave of 629KHz between next bar, as during videograph, occurring, so these phase shifts are cancelled from the 3.5MHz chrominance sideband of carrying to up conversion blender 520.

Another form that stable 4.21MHz generator 519 in Fig. 9 presentation graphs 6 can be taked, it is similar to the form that adopts in the prior art VHS home video tape recording playback circuitry.Simple the stable 4.21MHz generator in Fig. 7,8, held F.F. here better, other and trick mode such as freeze frame.From the simulation color subsidiary signal of digital to analog converter 518 with producing four mutually 4.21MHz stable clock signal blender 601, mix.The phasing of gained is suitable for the 3.58MHz sideband of a composite video signal to be separated by band pass filter 602, and it suppresses the picture signal of higher frequency.Colour burst gated circuit 603 is selected burst signal from the 3.58MHz sideband that obtains, deliver to locking phase detector 604, and it detects the error of the burst signal of separating from the 3.58MHz vibration that quartz (controlled) oscillator 610 is carried.(be widely used in color TV set because of the 3.58MHz crystal oscillator, thus more cheap relatively, and the general time basic benchmark as the servomechanism of controlling belt speed of 3.58MHz vibration.Error signal is the low pass filter 605 of the duration of several pixels by the order of magnitude of timeconstant 3, delivers to voltage-controlled 629KHz oscillator 606 as control signal then, and it reappears owes four phase carrier waves of colour signal.The four phase 629KHz vibration of being carried by oscillator 606 and mix blender 607 from the single-phase 3.58MHz vibration of quartz (controlled) oscillator 610 produces four phase 2.95MHz and 4.21MHz carrier wave.Band pass filter 608 selects four phase 4.21MHz carrier waves as 4.21MHz stable clock signal, delivers to blender 601.The effect of the negative feedback loop that is made of interconnected parts 601-608 is to remove the phase modulated in the ranks that adds during the video signal recording at playback duration from 3.58MHz chrominance sideband and the burst signal that accompanies.

Figure 10 represents the prior art device, and it responds to the signal from the playback circuitry of Fig. 6, produces the low level TV signal.The playback luminance signal L of multiplexer 547 delivers to the digital to analog converter among Figure 10 from Fig. 6, convert digital form to analog form, sample according to a stable clock signal by transducer 650, it with Fig. 6 in be used for clock signal from the output sampling timing of time base corrector 515 the same.The analog luminance signal that obtains and in a linear synthetic circuit 6651, sue for peace from the carrier chrominance signal of up-converter among Fig. 6 520.Linear synthetic circuit 651 can be a simple analog signal summing circuit, for example a resistor matrix.The frequency division multiplexing signal that obtains is delivered to low power television transmitter 652, according to the amplitude modulation of controlling from the frequency division multiplexing signal of linear synthetic circuit 651 the low power television image carrier.In order to save the cost of low power television transmitter, can adopt the balance amplitude modulation(PAM) of part compressed image carrier wave, rather than residual amplitude modulation(PAM).Also have the circuit (not shown) to be used for obtaining television audio signals from the signal that video tape is reset, and television audio signals is delivered to low power television transmitter 652, control is to the frequency modulation of tv audio carrier.The antennal interface of television receiver 653 delivered to its radiofrequency signal traditionally by low power television transmitter 652.

Figure 11 represents prior art VHS record/playback apparatus, so all parts of mentioning in claims have all drawn in the drawings.Tape transport 700 has a feed reel 701 and a machine reel 702, the video tape 703 that is used for rolling process DM drum module 704 under certain speed, speed is by at least one first driving capstan unit 705 control, and the first driving capstan unit 705 is under the control of tape coiling control device 706.In a single motor tape transport, feed reel 701 and machine reel 702 are by same motor driven, and required winding speed is adjusted in the driving capstan unit 705 that has mechanical couplings mechanism during tape 703 process DM drum modules 704.In a little tape transport of costliness, feed reel 701 and machine reel 702 can provide independent motor, and these motors are under the control of tape coiling control device 706.The DM drum module 704 that comprises recording head 7041 and reproducing head 7042 rotates having under the situation of an angle with tape through DM drum module.The rotating speed of the motor of the magnetic drum rotation in the driving DM drum module 704 is under the control of magnetic drum rotating-speed control circuit 707, and this circuit generally comprises several servomechanisms, in order to the rotating speed of magnetic drum during adjustment record and living the putting.

During writing down, convert analog form to by digital to analog converter 708 from the compound colourity/motor message C+M of the adder 18 in Fig. 1 or Fig. 2 writing circuit.Convert analog form from the luminance signal L of Fig. 1 brightness recording processor 40 or from the luminance signal and the identification signal L+ID of Fig. 2 brightness recording processor 400 to by digital to analog converter 709, deliver to frequency modulator 710 as modulation signal then.Transducer 708 and 709 each all output signal is separately carried out the low-pass filtering (not shown), the result of compressing and converting.Deliver to band pass filter 711 by the gained frequency modulated luminance carrier wave that frequency modulator 710 provides as input signal, its response is limited in being higher than the 1.4-5.9MHz from the shared frequency band of signal C+M of digital to analog converter 708.The response of band pass filter 711 and sue for peace in linear synthetic circuit 712 along 708 signal C+M from digital-to-analogue conversion forms a frequency division multiplexing signal and is added on the record amplifier 713.Linear synthetic circuit 712 can be a simple analog signal and circuit, for example a resistor matrix.713 pairs of compound signals of record amplifier write down equilibrium treatment, and the gained signal is delivered to recording head 7041 in the DM drum module 704.

Playback duration, 714 pairs of composite signals from the reduction of the reproducing head in the DM drum module 704 7042 of playback amplifier respond, and produce one and remove the balanced composite signal of record.The composite signal of flat response is delivered to high pass filter 715, and it isolates the frequency modulated luminance carrier wave at the 1.4-5.9MHz frequency band, and it is delivered to FM demodulator 716.Demodulator 716 is gone back original luminance signal L or brightness and recording mode identification signal L+ID, and they are delivered to the analog to digital converter 513 of Fig. 6.Flat response composite signal from playback amplifier 714 also is sent to low pass filter 717, and it isolates signal C+M.Buffer amplifier 718 is connected on the output of low pass filter 717, and the signal that separates is delivered to the analog to digital converter 514 of Fig. 6.

To one skilled in the art, also have some different phase-locked loop designs, they can be used as alternative embodiment of the present invention.For example, the output of address counter is actually a sawtooth waveforms, and the repetition edge that it can be latched horizontal synchronizing pulse responds, and is that VCD produces an error signal, the vibration of this VCO be by this address counter counting.Again for the another one example, above-mentioned phase-locked loop can be made amendment, so that adopt from the read-only memory addressing of the digitlization sawtooth waveforms of address counter to the steeper kam-frequency characteristic curve of the storage gradient, the repetition edge that it can be latched horizontal synchronizing pulse responds, and the VCO that is counted for self vibration produces an error signal.For the 3rd example, the response of digital frequency discriminator can convert analog form to again, and horizontal synchronizing pulse can be used for the response of this simulation frequency discriminator of gating, so that the VCO that is counted for self vibration produces an error signal.Other variation in the phase-locked loop design also is known.

Shown that

blender

12 and 520 is such types, they select the poor of mixed signal by blender output filtering, as the output signal of blender.In implementing other videograph/playback system of the present invention, also adopt by blender output filtering select mixed signal and the sort of blender, at this moment the 4.21MHz carrier wave is replaced by the 2.95MHz carrier wave.

In video tape recorder, the generation of colored subsidiary signal is to carry out under digital state fully or substantially, so the present invention can implement in the scope widely.More than concrete in conjunction with to the processing spec of folded spectrum luminance signal to the separately luminance signal of record and the process that carrier chrominance signal is carried out TBC.Consider separately the luminance signal and the carrier chrominance signal of record are carried out TBC, principle of the present invention generally can be used for videograph/playback system, wherein to luminance signal or carrier chrominance signal or not only luminance signal but also carrier chrominance signal carry out digital processing, and this digital processing needs time base stability.

Claims

1, a kind of video tape recorder is characterized in that comprising:

Recording composite video signal of carrying as input signal is carried out the device of digitized processing;

Said composite video signal is responded, produce a motor message, discern the device of former the basic pixels that change of embodiment of said composite video signal;

Be used for during writing down, at least in the time except that special time, by to former the basic pixels that change of the embodiment of digitlization composite video signal in two-dimensional space territory filtering when the front court, and by to former the indeclinable substantially pixels of the embodiment of said digitlization composite video signal at time-domain filtering, the digital filter circuit that is fit to that said motor message is responded;

Be used for detecting the time base error and the instable non-standard input detector of said composite video signal, to contain said composite video signal less than time base error or instable specified quantitative incorporates into and is standard input signal, incorporate into and be non-standard input signal and will contain said composite video signal greater than time base error or instable specified quantitative, and export a this division result's of expression the signal of telecommunication;

The signal of telecommunication that is used to write down of dividing the result when the expression of said indication standard input signal when the time beyond the special time is received, the device that said suitable digital filter circuit is responded to said motor message;

The signal of telecommunication that is used to write down of dividing the result when the expression of the non-standard input signal of said indication is received and when limiting described special time, makes said suitable digital filter circuit to all pixels of said digitlization composite video signal device in said two-dimensional space filtering; And

Insert the video signal device of a said division result's of expression record.

2, the device of playback of video tracer signal, it is characterized in that: said videograph signal comprises having the row that is distributed in wherein synchronously and the folded spectrum luminance signal of field synchronization information, and colored subsidiary signal with colourity and motor message component, some also allow to comprise the luminance signal of the said folded spectrum of time-division multiplex transmission certain of said videograph signal, indicating said videograph signal is that the standard composite video signal that does not contain time base error substantially by when record constitutes, the division consequential signal that the non-standard composite video signal that contains time base error substantially during still by record constitutes, the device of said playback of video tracer signal comprises:

Said capable synchronizing information and field synchronization information are separated from said folded spectrum luminance signal, and the separator that they also are separated from each other;

Said folded spectrum luminance signal is carried out first analog to digital converter of digitized processing;

Said colored subsidiary signal is carried out second analog to digital converter of digitized processing;

The corresponding device thereof that is used for the time base error in the correcting digital folded spectrum luminance signal and color digital subsidiary signal separately;

Digital folded spectrum luminance signal through time base correction is responded, produce a device that comprises the expansion spectrum signal that launches the frequency spectrum luminance signal component;

The device that will separate with motor message through the said carrier chrominance signal in the color digital subsidiary signal of time base correction;

Be used at playback duration, at least often rather than at special time, by to former basic pixels that change of the embodiment that launches spectrum signal in two-dimensional space territory filtering when the front court, and pass through former indeclinable substantially pixels of the embodiment of said expansion spectrum signal at time-domain filtering, said motor message is responded, and produce the digital filter circuit that is fit to of a playback luminance signal thus;

From said through the digital folded spectrum luminance signal of time base correction multichannel isolate the device of said index signal, this index signal instruction video tracer signal is that the standard composite video signal that does not contain time base error substantially by when record constitutes, and still is made of the non-standard composite video signal that contains time base error substantially;

When said division consequential signal indication, rather than at special time, said videograph signal is the standard composite video signal that does not contain time base error substantially by when record when constituting, the device that said suitable digital filter circuit is responded to said motor message; And

When the indication of said division consequential signal is the non-standard composite video signal that contains time base error during by record substantially when constituting in the said tracer signal of special time that limits, make said suitable digital filter circuit to all pixels of said expansion spectrum signal device in said two-dimensional space filtering.

3, in the video tape recorder of a recorded video signal, it is characterized in that comprising:

Said capable synchronizing information and field synchronization information are separated from the said vision signal that is writing down, and the separator that they also are separated from each other;

First pixel clock signal is responded, produce first analog to digital converter of each digital sample of the said vision signal that is writing down;

Produce first controlled oscillator of said first pixel clock signal under a speed, the frequency of this pixel clock signal and phase place determine that according to first oscillator control signal said speed is at least the twice of the said vision signal highest frequency that is writing down;

To first counter that said first pixel clock signal of being carried by said first controlled oscillator is counted, said first counter is reset to one first initial value after the number of scanning lines to regulation;

The part that is created in the frequency of said first pixel clock signal is located the device of first feedback signal of reproduction;

Differentiate that when the frequency and the phase place of said first feedback signal are different from the capable synchronizing information of separating from the said vision signal that is writing down, thereby produce first phase detectors of one first error signal;

Said first error signal is responded, produce first low pass filter of said first oscillator control signal, so far formed first phase-locked loop, it comprises said first controlled oscillator, first feedback signal generator, first phase detectors and first low pass filter;

Produce second controlled oscillator of said second pixel clock signal under a speed, the frequency of this pixel clock signal and phase place determine that according to second oscillator control signal said speed is the long-term average of the said first pixel clock signal speed;

To second counter that said second pixel clock signal of being carried by said second controlled oscillator is counted, said second counter is reset to one second initial value after the number of scanning lines counting to said regulation;

The part that is created in the frequency of said second pixel clock signal is located the device of second feedback signal of reproduction;

Differentiate that when the frequency and the phase place of said second feedback signal are different from the capable synchronizing information of separating from the said vision signal that is writing down, thereby produce second phase detectors of one second error signal;

Said second error signal is responded, produce second low pass filter of said second oscillator control signal, so far formed second phase-locked loop, it comprises said second controlled oscillator, second feedback signal generator, second phase detectors and second low pass filter, enough little frequency and the phase change that to follow the tracks of the said capable synchronizing information of from the said vision signal that is writing down, separating fast that make of the time constant of wherein said first low pass filter, and the time constant of wherein said second low pass filter is enough big, the feasible relative slow variation that only can follow the tracks of the frequency and the phase place of the said capable synchronizing information of separating from the said vision signal that is writing down; And

Go into/go out earlier memory earlier for one, its input port receives the digital sample of the said vision signal that is produced by described first analog to digital converter, delivery outlet is carried the digital sample of the said vision signal after the temporary transient storage, saidly goes into/goes out earlier memory earlier and receive based on the write address of said first counting of at least a portion with based on the address of reading of said second rolling counters forward of at least a portion.

4, in the video tape recorder of record composite video signal, it is characterized in that adopting according to the brightness of said composite video signal and partly carry out the luminance carrier of frequency modulation and adopt colored subsidiary signal, said video tape recorder comprises:

The separator that from the composite video signal that is writing down, separates trip synchronizing information and field synchronization information;

First pixel clock signal is responded, produce first analog to digital converter of the digital sample of said composite video signal;

Produce first controlled oscillator of said first pixel clock signal under a speed, the frequency of this pixel clock signal and phase place determine that according to first oscillator control signal said speed is at least the twice of said composite video signal highest frequency;

To first counter that said first pixel clock signal of being carried by said first cavity controlled oscillator is counted, said first counter is reset to its initial value after to the counting of the pixel in the number of scanning lines of regulation;

Differentiate that when the frequency and the phase place of said first feedback signal are different from the capable synchronizing information of separating from said composite video signal, thereby produce first phase detectors of one first error signal;

Under a speed, produce second controlled oscillator of said second pixel clock signal, the frequency of this pixel clock signal and phase place determine that according to second oscillator control signal said speed is for being produced the long-term average of the said first pixel clock signal speed by said first controlled oscillator;

To second counter that said second pixel clock signal of being carried by said second controlled oscillator is counted, said second counter is reset to its initial value after to the counting of the pixel in the number of scanning lines of said regulation;

Differentiate that when the frequency and the phase place of said second feedback signal are different from the capable synchronizing information of separating from said composite video signal, thereby produce second phase detectors of one second error signal;

Said second error signal is responded, produce second low pass filter of said second oscillator control signal, so far formed second phase-locked loop, it comprises said second controlled oscillator, second feedback signal generator, second phase detectors and second low pass filter, the time constant of wherein said first low pass filter is enough little, feasible frequency and the phase change that can follow the tracks of the said capable synchronizing information of from said composite video signal, separating quickly, and the time constant of wherein said second low pass filter is enough big, the feasible relative slow variation that only can follow the tracks of the frequency and the phase place of said capable synchronizing information;

Go into/go out earlier memory earlier for one first, its input port receives the digital sample of the said composite video signal that is produced by said first analog to digital converter, delivery outlet is carried the digital sample of the said composite video signal after the temporary transient storage, and said first goes into/go out earlier the memory reception earlier reads the address based on first write address of said first rolling counters forward of at least a portion with based on first of said second rolling counters forward of at least a portion;

Digital sample to the said composite video signal of carrying from said first delivery outlet of going into/going out earlier memory earlier of temporary transient storage responds, and produces the device of a signal that the frequency of said luminance carrier is modulated;

Counting to said first counter responds, and produces the device of a maincenter carrier wave;

Isolate the device of the chrominance information part of a said composite video signal;

By mixing with said maincenter carrier wave, the device with the chrominance information part downward conversion of said composite video signal produces a downward conversion result thus; And

Said downward conversion result is responded, produce the device of said colored subsidiary signal.

5, according to the video tape recorder of claim 4, wherein said colored subsidiary signal generating means comprises:

Said first pixel clock signal is responded, produce second analog to digital converter of said downward conversion result's digital sample;

One second earlier and/go out memory earlier, its input port receives the said downward conversion result's who is produced by said second analog to digital converter digital sample, delivery outlet is carried the digital sample of the said downward conversion result after the temporary transient storage, said second goes into/go out earlier memory earlier receives corresponding to by said first second write address of going into/going out earlier said first write address that memory receives earlier, and based on the second reading address of said second rolling counters forward of a part; And

Digital sample to the said downward conversion result who carries from said second delivery outlet of going into/going out earlier memory earlier of temporary transient storage responds, and produces said colored subsidiary signal device.

6, the replay device that is used for the playback of video tracer signal, it is characterized in that said replay device is such one type, wherein simulate row that folded spectrum luminance signal and time separates with it and field synchronization information and be by detecting and obtain from the modulating frequency of the luminance carrier of recording medium reduction, and wherein the carrier chrominance signal of encoding in a simulation color subsidiary signal is reduced from said recording medium, and said replay device comprises:

The separator that from the luminance signal of said simulation folded spectrum, separates said row and field synchronization information;

First pixel clock signal is responded, produce first analog to digital converter of digital sample of the luminance signal of said simulation folded spectrum;

Said first pixel clock signal is responded, produce second analog to digital converter of the digital sample of said simulation color subsidiary signal;

Produce first controlled oscillator of said first pixel clock signal under a first rate, the frequency of this pixel clock signal and phase place determine according to first oscillator control signal;

In first counter of counting, said first counter after the pixel counting, is reset to its initial value in to the number of scanning lines of regulation to said first pixel clock signal carried by said first controlled oscillator;

Differentiate that when the frequency of said first feedback signal is different from the capable synchronizing information of separating with phase place, thereby produce first phase detectors of one first error signal;

Under one second speed, produce second controlled oscillator of said second pixel clock signal, the frequency of this pixel clock signal and phase place determine that according to second oscillator control signal said speed is for being produced the long-term average of the said first pixel clock signal speed by said first controlled oscillator;

To second counter that said second pixel clock signal of being carried by said second controlled oscillator is counted, said second counter after the pixel counting, is reset to its initial value in to the number of scanning lines of said regulation;

Differentiate that when the frequency and the phase place of said second feedback signal are different from the capable synchronizing information of separating from the luminance signal of described analog spectrum, thereby produce first phase detectors of one first error signal;

Said second error signal is responded, produce second low pass filter of said second oscillator control signal, so far formed second phase-locked loop, it comprises said second controlled oscillator, second feedback signal generator, second phase detectors and second low pass filter, the time constant of wherein said first low pass filter is enough little, feasible frequency and the phase change that can follow the tracks of the said capable synchronizing information of separating quickly, and the time constant of wherein said second low pass filter is enough big, makes only to follow the tracks of the variation of the frequency and the phase place of the said capable synchronizing information of separating more slowly;

Go into/go out earlier memory earlier for one first, its input port receives the digital sample of the said composite video signal that is produced by said first analog to digital converter, and delivery outlet is carried the digital sample of the said composite video signal after the temporary transient storage; And

Go into/go out earlier memory earlier for one second, its input port receives the digital sample of the said composite video signal that is produced by said second analog to digital converter, and delivery outlet is carried the digital sample of the said composite video signal after the temporary transient storage; And

Go into earlier with said first and second/go out the device that memory links to each other earlier, be used for producing write address, and the address is read in said second rolling counters forward generation based at least a portion based on said first rolling counters forward of at least a portion.

7, replay device as claimed in claim 6, wherein said simulation color subsidiary signal from recording medium reduction also is included in the motor message of encoding in the said simulation color subsidiary signal except the carrier chrominance signal that comprises coding, and said replay device also comprises:

The digital sample of criticizing time base correction from the said first said folded spectrum luminance signal of going into/going out earlier memory output outlet is earlier responded, and producing with the spectrum folding phenomenon is the device of digital deployment signal of the expression entire spectrum luminance signal of feature;

To the said colored subsidiary signal of going into/going out earlier the memory delivery outlet from second earlier carry out the device of digital filtering through the digital sample of time base correction so that the motor message of coding and the carrier chrominance signal of said coding are separated from each other;

Thereby said coding motor message is deciphered the device of the motor message that produces a reduction;

Digital deployment signal is carried out time and spatial manipulation so that reduction does not contain the device of digital sample of the said entire spectrum luminance signal of expression of said spectrum folding phenomenon substantially, and the relative extent that space-time is handled is determined by a control signal; And

Produce the device of said control signal according to said reduction motor message, so that handle, and carry out spatial manipulation at the device that rapid movement part scan period of said reproduced picture is handled digital deployment signal by said space-time in the device time of carrying out that microinching part scan period of reproduced picture is handled digital deployment signal by said space-time.

8, replay device as claimed in claim 7, wherein saidly launch luminance signal to numeral and carry out the device that space-time handles and comprise:

Said digital deployment signal is carried out the termporal filter of time processing by frame comb filtering;

Said digital deployment signal is carried out the spatial filter of spatial manipulation by field and row comb filtering;

Said control signal is responded, produce the kinematic coefficient generator of a kinematic coefficient signal;

According to ratio, will produce the said entire spectrum luminance signal that does not contain the spectrum folding phenomenon substantially thus through the soft switch that the time handles and the digital deployment signal of spatial manipulation mixes by said kinematic coefficient signal deciding.

9, replay device as claimed in claim 7 also comprises:

The said entire spectrum luminance signal that does not contain the spectrum folding phenomenon is substantially converted to first digital to analog converter of analog signal;

To responding, thereby produce second digital to analog converter of downward conversion carrier chrominance signal of the analog form of a reduction from said coding carrier chrominance signal with said coding motor message and the device that is separated from each other of coding carrier chrominance signal;

To the analog form of up conversion reduction through the carrier chrominance signal of downward conversion so that produce the up-converter of an output carrier chrominance signal;

By said output carrier chrominance signal from up-converter is mixed the device that reappears composite video signal with simulation entire spectrum luminance signal; And

Device with a TV carrier signal of composite video signal modulation that reappears.

10, replay device as claimed in claim 6, wherein said simulation color subsidiary signal from recording medium reduction is except comprising said carrier chrominance signal, the motor message that also comprises coding, and wherein a signal from the recording medium reduction comprises that also the instruction video tracer signal is to be made of a video standard signal that has less than regulation time base error amount, still the signal that constitutes by a non-standard video signal that has greater than regulation time base error amount, said replay device also comprises:

To having done response from said first digital sample through time base correction of going into/going out earlier the said folded spectrum luminance signal of memory delivery outlet earlier, producing with the spectrum folding phenomenon is the device of digital deployment signal of the expression entire spectrum luminance signal of feature;

The digital sample of criticizing time base correction from the said second said colored subsidiary signal of going into/going out earlier the memory delivery outlet is earlier carried out the device of digital filtering, so that the motor message of said coding and the carrier chrominance signal of said coding are separated from each other;

To digital deployment signal carry out time and spatial manipulation in case reduction substantially can said spectrum folding phenomenon the device of said entire spectrum luminance signal, the relative extent that space-time is handled is determined by a control signal; And

The device that produces said control signal comprises:

Detecting said index signal and be indication videograph signal is made of said standard signal or indicates the device that is made of said non-standard signal;

Detected instruction video tracer signal is responded by the index signal that said standard signal constitutes, thereby produce the device of said control signal according to said reduction motor message, so that handle, and carry out spatial manipulation at the device that rapid movement part scan period of said reproduced picture is handled digital deployment signal by said space-time in the device time of carrying out that microinching part scan period of reproduced picture is handled digital deployment signal by said space-time; And

Detected instruction video tracer signal is responded by the index signal that said non-standard signal constitutes, thereby produce the device of said control signal, under the situation of not considering said reduction motor message, carry out spatial manipulation so that handle the device that launches luminance signal by said space-time.

11, the replay device as claim 10 also comprises:

To the carrier chrominance signal of the footpath downward conversion of the analog form of up conversion reduction so that produce the up-converter of an output carrier chrominance signal;

By said output carrier chrominance signal is mixed the device that reappears composite video signal with the simulation entire spectrum luminance signal that is produced by said first digital to analog converter; And

Device with a TV carrier signal of said composite video signal modulation.

12, video tape recorder is characterized in that comprising:

Be used for the device of the composite video signal that receiving record uses, said composite video signal comprises synchronizing signal, luminance signal and chroma signal component;

The device of first clock signal of the variation in the said synchronization signal components is followed the tracks of in generation with fast relatively speed;

Produce the device of the second clock signal of following the tracks of the variation in the said synchronization signal components at a slow speed;

Said composite video signal signal is carried out digitized processing, and its sampling rate is by first analog to digital converter of said first clock signal decision; And

Comprise one first and go into earlier/go out earlier first time base error correction of memory, said first time base error correction responds to said first clock signal, to write said first from the continuous sampling of the digital composite video signal of first analog to digital converter and go into/go out earlier memory earlier for temporary transient storage, and said second clock signal responded, read and temporarily be stored in said first and go into/go out earlier the continuous sampling of the said digital composite video signal in the memory earlier, as the digital composite video signal that is used to write down through time base correction.

13, video tape recorder as claimed in claim 12, the tracking velocity of wherein above-mentioned second clock signal is approximately 20 times of horizontal scan line.

14, the video tape recorder as claim 12 also has a brightness recording processor, comprising:

A luminance carrier is carried out frequency modulation, produce a frequency modulator as the frequency modulated luminance carrier wave of tracer signal component;

Said digital composite video signal through time base correction from first time base error correction is responded, produce the device of a motor message;

By to carrying out the device of time and spatial manipulation separating luminance component from the said digital composite video signal through time base correction of first time base error correction, the relative extent that space-time is handled is determined by one first control signal;

At least at select time said motor message is responded, produce the device of said first control signal, so that handle by the device time of carrying out of said separating luminance component in microinching part scan period to document image, and to rapid movement part scan period of document image the device by said separating luminance component carry out spatial manipulation;

The various frequency down conversion frequencies of the high band by the luminance component that will separate, and they are fixed on the low-frequency range of the luminance component of separation, produce the luminance signal device of a compression bandwidth; And

At least in the time of selecting, the luminance signal of said compression bandwidth revolved be added to said frequency modulator, so that said luminance carrier is carried out the device of frequency modulation.

15, as the video tape recorder of claim 14, the device of wherein said separating luminance component comprises:

By frame comb filtering, the termporal filter that luminance signal is separated from the dateout from said first time base corrector; And

By field and row comb filtering, the spatial filter that luminance signal is separated from the dateout from said first time base corrector;

The device of wherein said generation motor message comprises: be used to detect the motion detector from the said motor message of the dateout of said first time base error correction; And

Wherein said brightness recording processor also comprises:

Output to said motor message detector responds, and produces the kinematic coefficient generator of a kinematic coefficient; And

Carry a soft switch of the output of said termporal filter that the kinematic coefficient according to said kinematic coefficient generator mixes and spatial filter to the device of the luminance signal of said generation compression bandwidth.

16, as the video tape recorder of claim 14, the device of wherein said generation first control signal comprises:

A non-standard input detector is used for detecting the predetermined value that the time base error that is included in said composite video signal surpasses a said composite video signal criteria of right and wrong signal of indication, and produces a signal instruction this point; And

Said indication composite video signal is determined that the signal of a non-standard signal responds, and control is by handling the device isolate luminance component and make it carry out the device of spatial manipulation carrying out space-time from the digital composite video signal of first analog to digital converter.

17,, also comprise said motor message and the said composite video signal of indication as the tracer signal component are determined that the signal of a non-standard signal carries out apparatus for encoding as the video tape recorder of claim 16.

18, comprise image karaoke device as a videograph/playback system part as the video tape recorder of claim 17, said image karaoke device has a brightness replay processor, and said brightness replay processor comprises:

Reduce the device of luminance signal of said compressed bandwidth;

Reduce the device of said motor message;

In the luminance signal of the compressed bandwidth of reducing, carry out the device that time base error is proofreaied and correct;

In the motor message of reduction, carry out the device that time base error is proofreaied and correct;

The luminance signal of compressed bandwidth to reduction responds, produce the luminance signal device of a recovery, wherein frequency down conversion and the component that is fixed on a low-frequency range are recovered to the original frequency of high band during writing down, thereby produce the luminance signal of a recovery;

The luminance signal of said recovery is carried out the device of time and spatial manipulation, and the relative extent that space-time is handled is determined by one second control signal; And

The device that produces said second control signal comprises:

Device to the signal interpretation of said indication composite video signal criteria of right and wrong signal;

The device of when said composite video signal is determined criteria of right and wrong signal, working, it makes said second control signal control carry out the device that space-time is handled to the luminance signal of restoring, and makes it only carry out spatial manipulation; And

The device of when said composite video signal is not determined criteria of right and wrong signal, working, the motor message of said reduction responded produce said second control signal, so that handle, and carry out spatial manipulation at the device that rapid movement part scan period of said reproduced picture is handled the luminance signal of restoring by said space-time in the device time of carrying out that microinching part scan period of reproduced picture is handled the luminance signal of restoring by said space-time.

19, as the videograph/playback system of claim 18, the device that carries out the space-time processing comprising the luminance signal to restoring in said image karaoke device comprises:

By frame comb filtering, the luminance signal of said recovery is carried out the termporal filter of time filtering;

By field and row comb filtering, the luminance signal of said recovery is carried out the spatial filter of space filtering;

The motor message of said reproduction and the output signal of code translator are responded, produce the kinematic coefficient generator of a kinematic coefficient signal, the said composite video signal of indication that code translator comes out from recording medium replay to said image karaoke device determines that the signal of a non-standard signal deciphers; And

Carry handling and a soft switch of the signal of spatial manipulation according to the mixed of determining by said kinematic coefficient signal through the time.

20, as the video tape recorder of claim 17, wherein said motor message and said indication composite video signal are determined that the signal of criteria of right and wrong signal carries out apparatus for encoding and comprises:

Produce a said composite video signal of identification and whether be defined as the identification generator of the identification signal of non-standard signal, wherein saidly in the time of selecting the device that the luminance signal of said compression bandwidth is applied on the frequency modulator that said luminance carrier is carried out frequency modulation is comprised at least:

Produce the gating signal generator of a gating signal, this gating signal has one first value at the predetermined space of field blanking interval, and except that said first value, also has one second value at least; And

A multiplexer, at least a portion modulation signal that its output link will impose on it flows to said frequency modulator, its the first output link receives said identification signal, the second input link receives the luminance signal of said compression bandwidth, this multiplexer is according to said gating signal with first value, output link at it responds to the signal that receives at the said first input link, and, the signal that connect to receive in said second input is responded at its output link according to said gating signal with second value.

21, as the video tape recorder of claim 14, also comprise:

Said motor message is responded, produce the motion process device of the amplitude-modulation sideband of the motion carrier wave that said motor message is encoded, and

The carrier chrominance signal recording processor comprises:

Carrier chrominance signal separated from composite video signal and carrier chrominance signal carried out the device that downward conversion is handled,

To carry out second analog to digital converter of digitized processing through the carrier chrominance signal of downward conversion;

Digitized carrier chrominance signal through downward conversion is carried out second time base error correction that time base error is proofreaied and correct; And

By to carry out frequency band limits and the anti-filtering of crosstalking through the digitized downward conversion carrier chrominance signal of time base correction, produce the chroma signal processor of the amplitude-modulation sideband of colored subordinate carrier wave; And

The amplitude-modulation sideband of said motion carrier wave and the amplitude-modulation sideband of said colored subordinate carrier wave are mixed, produce the device of a colourity/motion composite signal, then, said colourity/motion composite signal is mixed with the frequency modulated luminance carrier wave, for record.

22, as the video tape recorder of claim 21, the device of wherein said generation first control signal comprises:

Be used for detecting the time base error that is included in the said composite video signal and surpassed a predetermined value, and to indicate said composite video signal to determine be the non-standard input detector of a non-standard signal; And

By the control of said first control signal to indicating said composite video signal to determine the device that the signal of a non-standard signal responds, be used for by the digitlization composite video signal being carried out the time and spatial manipulation is separated luminance component from first analog to digital converter, so that only carry out spatial manipulation.

23,, also comprise said indication composite video signal is determined that the signal of criteria of right and wrong signal carries out apparatus for encoding as the video tape recorder of claim 22.

24, as the video tape recorder of claim 23, wherein said indication composite video signal is determined that the signal of a non-standard signal carries out apparatus for encoding and comprises that it is the identification generator of the identification signal of said non-standard signal that one of generation indicates said composite video signal to determine; And wherein saidly in the time of selecting the device that the luminance signal of said compression bandwidth is applied on the frequency modulator that said luminance carrier is carried out frequency modulation is comprised at least:

A multiplexer, at least a portion modulation signal that its output link will impose on it flows to said frequency modulator, its the first input link receives said identification signal, the second input link receives the luminance signal of said compression bandwidth, this multiplexer is according to said gating signal with first value, output link at it responds to the signal that receives at the said first input link, and, the signal that receives at the said second input link is responded at its output link according to said gating signal with second value.

25, the video tape recorder as claim 23 comprises that this image karaoke device comprises as the image karaoke device of a videograph/playback system part:

A colourity/motion replay processor comprises:

The device of reduction colourity/motion composite signal,

In the colourity/motion composite signal of reduction, carry out the device that time base error is proofreaied and correct, and

The device that the motor message and the carrier chrominance signal through downward conversion of reduction of reduction is separated from each other;

The luminance signal replay processor comprises:

Reduce the luminance signal of said compression bandwidth,

In the luminance signal of the compression bandwidth of said reduction, carry out the device that time base error is proofreaied and correct,

Luminance signal to the compression bandwidth of said reduction responds, produce the device of the luminance signal of a recovery, wherein frequency down conversion and the component that is fixed on a low-frequency range are recovered to the original frequency of high band during writing down, thereby produce the luminance signal of a recovery, and

The luminance signal of said recovery is carried out the device of time and spatial manipulation, and the relative extent that space-time is handled is determined by one second control signal;

The device that produces said second control signal comprises:

To indicating said composite video signal to determine the device of signal interpretation of the reproduction of criteria of right and wrong signal,

The device of when said composite video signal is determined criteria of right and wrong signal, working, it makes said second control signal control carry out the device that space-time is handled to the luminance signal of restoring, and makes it only carry out spatial manipulation, and

26, as the videograph/playback system of claim 25, the device that carries out the space-time processing comprising the luminance signal to restoring in said image karaoke device comprises:

27, as the videograph/playback system of claim 26, the device that carries out the space-time processing comprising the luminance signal to restoring in said image karaoke device also comprises:

From the luminance signal of said recovery, eliminate the wave excluder of making an uproar of the ripple of making an uproar; And

Select signal to determine by a mode, select the multiplexer of the output signal of the output signal of said soft switch or the said wave excluder of making an uproar as the output luminance signal.

28, as the videograph/playback system of claim 27, wherein said image karaoke device comprises:

Adopt a stable clock signal, said output luminance signal is converted to first digital to analog converter of analog form;

Adopt said stable clock signal, the carrier chrominance signal through downward conversion of said reduction is converted to second digital to analog converter of analog form;

With the reduction of analog form through the carrier chrominance signal of downward conversion to up conversion, so that reappear the up-converter of the carrier chrominance signal of from composite video signal, separating;

Reappear the device of composite video signal, this device mixes the carrier chrominance signal and the output luminance signal of the reproduction of analog form; And

29, be suitable for the replay device of a tracer signal of resetting, this tracer signal comprises a first carrier according to analog video signal frequency modulation, and this tracer signal also has synchronizing signal and luminance signal component, it is characterized in that said replay device comprises:

Reduce the device of said tracer signal;

From the tracer signal of reduction, extract the device of said frequency modulated carrier;

To said frequency modulated carrier demodulation of from the tracer signal of reduction, extracting, thereby reappear said device with analog video signal of synchronizing signal and luminance signal component;

The device of first clock signal of the variation in the synchronization signal components of analog video signal of said reproduction is followed the tracks of in generation with fast relatively speed,

The device of the second clock signal of the variation in the synchronization signal components of analog video signal of said reproduction is followed the tracks of in generation with slow relatively speed;

The analog video signal that reappears is carried out digitized processing, and its sampling rate is by first analog to digital converter of said first clock signal decision; And

Comprise one first and go into earlier/go out earlier the basic error corrector of the first couple of memory, said first time base error correction responds to said first clock signal, to write said first from the continuous sampling of the digital video signal of first analog to digital converter and go into/go out earlier storage earlier along for temporary transient storage, and said second clock signal responded, read and temporarily be stored in said first and go into/go out earlier the continuous sampling of the said digital video signal in the memory earlier, as digital video signal through time base correction.

30, as the replay device of claim 29, the tracking velocity of wherein said second clock signal is approximately 20 horizontal scanning lines.

31, as the replay device of claim 29, be suitable for the frequency division multiplexing signal of playback of recorded, this signal comprises the said frequency modulation first carrier and the second carrier wave sideband, said replay device also comprises:

The device of the said second carrier wave sideband of reduction from recording medium,

Sideband to said second carrier wave carries out digitized processing, and its sampling rate is by second analog to digital converter of said first clock signal decision; And

Comprise one second and go into earlier/go out earlier second time base error correction of memory, said second time base error correction responds to said first clock signal, to write said second from the continuous sampling of the digitlization sideband of said second carrier wave of second analog to digital converter and go into/go out earlier memory earlier for temporary transient storage, and said second clock signal responded, read and temporarily be stored in said second continuous sampling of going into/going out earlier the digitlization sideband of said second carrier wave in the memory earlier, as digitlization sideband through said second carrier wave of time base correction.

32, as the replay device of claim 31, the frequency division multiplexing signal that is suitable for playback of recorded, this signal comprises the said frequency modulation first carrier and the second carrier wave sideband, wherein the luminance signal component of the said analog video signal of the said first carrier of frequency modulation(FM) is the form of folded spectrum, and the sideband of wherein said second carrier wave is encoded to a motor message; Said replay device also comprises:

Device to the digital sample through time base correction from the luminance signal component of the said first said digital video signal through time base correction of going into/going out earlier the memory delivery outlet earlier responds is used to produce the deployment signal that an expression has the entire spectrum luminance signal of spectrum folding phenomenon;

To responding, to the device of said motor message decoding from said second digital sidebands through time base correction of going into/going out earlier said second carrier wave of memory delivery outlet earlier;

Said deployment signal is carried out time and spatial manipulation, thereby reduction does not contain the device of digital sample of the said entire spectrum luminance signal of said spectrum folding phenomenon substantially, carry out the relative extent that space-time handles and determine by a control signal; And

Produce the device of said control signal, it comprises the time service of selecting at least, produce the device of said control signal according to the motor message of decoding, so that handle, and carry out spatial manipulation at the device that rapid movement part scan period of said reproduced picture is handled digital deployment signal by said space-time in the device time of carrying out that microinching part scan period of reproduced picture is handled digital deployment signal by said space-time.

33, as the replay device of claim 31, the frequency division multiplexing signal that is suitable for playback of recorded, this signal comprises said frequency modulation first carrier, wherein the luminance signal component of the said analog video signal of the said first carrier of frequency modulation(FM) is the form of folded spectrum, wherein allegedly first group of sideband of second carrier wave encoded to a motor message, and second group of sideband of said second carrier wave is colored subsidiary signal; Said replay device also comprises:

To responding, produce the device of digital sample of the deployment signal of the entire spectrum luminance signal that expression has the spectrum folding phenomenon from said first digital sample through time base correction of going into/going out earlier the said analog video signal luminance signal component of memory delivery outlet earlier;

The digital sidebands through time base correction to said first carrier responds, with first, second device of being separated from each other of group sideband of said second carrier wave;

To device from the said motor message decoding of first group of sideband of said second carrier wave;

Said digital deployment signal is carried out time and spatial manipulation, thereby reduction does not contain the device of digital sample of the said entire spectrum luminance signal of said spectrum folding phenomenon substantially, carry out the relative program that space-time handles and determine by a control signal;

Produce the device of said control signal, it comprises the time service of selecting at least, produce the device of said control signal according to the motor message of decoding, so that handle, and carry out spatial manipulation at the device that rapid movement part scan period of said reproduced picture is handled digital deployment signal by said space-time in the device time of carrying out that microinching part scan period of reproduced picture is handled digital deployment signal by said space-time;

Substantially the said entire spectrum luminance signal that does not contain said spectrum folding phenomenon is converted to first digital to analog converter of analog form;

The second group of sideband that is separated from each other said second carrier wave of device from said first, second group sideband with second carrier wave responded, produce second digital to analog converter of colored subsidiary signal of the reduction of an analog form thus;

Thereby reappear the up-converter of the carrier chrominance signal of from composite video signal, separating to the colored subsidiary signal of the reduction of up conversion analog form;

By the carrier chrominance signal and the output luminance signal of the reproduction of analog form are mixed the device that reappears composite video signal; And

34, replay device as claim 31, be suitable for from the frequency division multiplexing signal of recording medium replay record, this signal comprises said frequency modulation first carrier, wherein the luminance signal component of the said analog video signal of the said first carrier of frequency modulation(FM) is the form of folded spectrum, first group of sideband of wherein said second carrier wave encoded to a motor message, and second group of sideband of said second carrier wave is colored subsidiary signal, and wherein a signal from the signal of recording medium reduction comprises that the instruction video tracer signal is to be made of a video standard signal that has less than the time base error grade of regulation, still the signal that is made of a non-standard video signal that has greater than the time base error grade of regulation; Said replay device also comprises:

To responding, produce the device of digital sample of the deployment signal of the entire spectrum luminance signal that expression has the spectrum folding phenomenon from said first digital sample through time base correction of luminance signal component of going into/going out earlier the said analog video signal of memory delivery outlet earlier;

The digital sidebands through time base correction to said second carrier wave responds, with first, second device of being separated from each other of group sideband of said second carrier wave;

Said digital deployment signal is carried out time and spatial manipulation, thereby reduction does not contain the device of digital sample of the said entire spectrum luminance signal of said spectrum folding phenomenon substantially, carry out the relative extent that space-time handles and determine by a control signal;

The second group of sideband that is separated from each other said second carrier wave of device from said first, second group sideband with second carrier wave responded, produce second digital to analog converter of colored subsidiary signal of the reduction of an analog form thus; And

The device that produces said control signal comprises:

From the signal of recording medium reduction one comprises that to detect this index signal in the signal of index signal be indication videograph signal and is made of a video standard signal that has less than the time base error grade of regulation, still the device that is made of a non-standard video signal that has greater than the time base error grade of stipulating of instruction video tracer signal;

Detected instruction video tracer signal is responded by the index signal that said video standard signal constitutes, produce the device of said control signal according to the motor message of said reduction, so that handle, and carry out spatial manipulation at the device that rapid movement part scan period of said reproduced picture is handled digital deployment signal by said space-time in the device time of carrying out that microinching part scan period of reproduced picture is handled digital deployment signal by said space-time; And

Detected instruction video tracer signal is responded by the index signal that said video standard signal constitutes, do not consider that the motor message of said reduction produces the device of said control signal, so that the device of handling digital deployment signal by said space-time carries out spatial manipulation.

35, as the replay device of claim 34, said replay device also comprises:

36, the replay device that is used for the playback of video tracer signal is characterized in that said replay device comprises:

The device of an analog fm signal of reduction from recording medium;

To said analog fm signal demodulation, reduce a device with analog video signal of synchronization signal components;

The device of first clock signal of the variation of said synchronization signal components is followed the tracks of in generation with fast relatively speed;

The device of second clock signal of the variation of said synchronization signal components is followed the tracks of in generation with slow relatively speed;

The device of an analog chroma explanation of reduction signal from recording medium;

Said analog chroma is illustrated that signal carries out the analog to digital converter of digitized processing, and its sampling rate is determined by said first clock signal; And

Comprise one and go into/go out earlier the time base error correction of memory earlier, said time base error correction responds to said first clock signal, to write from the continuous sampling of the digital brightness of said analog to digital converter explanation signal and saidly go into/go out earlier memory earlier for temporary transient storage, and said clock signal responded, read and temporarily be stored in said continuous sampling of going into/going out earlier the said digital brightness explanation signal in the memory earlier, as digital brightness explanation signal through time base correction.

37, a kind of video processing circuit is characterized in that: comprising:

The time base correction device that the vision signal that temporary transient storage is read it again then during according to synchronizing signal is carried out time base correction;

The separated in synchronization device that the said synchronizing signal that is included in the said vision signal is separated;

The tone separation apparatus that the said carrier chrominance signal that is included in the said vision signal is separated;

The chrominance processing arrangement handled of said carrier chrominance signal to record;

The brightness processed device that the luminance signal that is included in the said vision signal is handled.

38, as the video processing circuit of claim 37, wherein said time base correction device comprises:

According to said synchronizing signal, produce the write address generation device of write address;

The address producing device of reading of address is read in generation; And

According to the temporary transient said vision signal of storage of said write address and according to said read vision signal that the address provides storage go into/go out earlier storage device earlier.

39, as the video processing circuit of claim 38, wherein said write address is to produce according to the horizontal synchronizing pulse that is included in the said synchronizing signal, and the said address of reading is to produce according to the field sync signal that is included in the said synchronizing signal.

40,, wherein saidly go into earlier/go out storage device earlier to comprise as the video processing circuit of claim 38:

Go into/go out earlier memory earlier for one first that receives said vision signal; And

Go into/go out earlier memory earlier for one second that receives said luminance signal.

41, as the video processing circuit of claim 38, wherein said write address generation device comprises one first phase-locked loop, and its first loop time constant approximates the duration of a scan line greatly.

42, as the video processing circuit of claim 38, the wherein said address producing device of reading comprises one second phase-locked loop, the duration that its second loop time constant offer is longer than a horizontal scanning line.

43, as the video processing circuit of claim 42, about long 20 times of the wherein said second loop time constants than the duration of said horizontal scanning line.

44, as the video processing circuit of claim 38, wherein said write address generation device comprises:

The write address counter of said write address is provided according to first oscillator signal;

Said write address is deciphered, and first code translator of the first decoder signal of indicating a particular address that receives said write address is provided;

Produce said synchronizing signal of indication and the said first decoder signal first comparison means of first error signal of comparative result afterwards;

First low-pass filter to said error signal filtering with very first time constant; And

Produce the device of said first oscillator signal, the frequency of oscillation of this signal is higher than the frequency of said synchronizing signal, and its phase place is subjected to control through said first error signal of the said first low-pass filter filtering.

45, as the video processing circuit of claim 44, wherein said very first time constant approximates the duration of a horizontal scanning line greatly.

46, as the video processing circuit of claim 44, also comprise:

Said vision signal is carried out first analog to digital converter of digital processing according to said first oscillator signal;

Produce the downward conversion device of colored subordinate carrier chrominance signal according to the said carrier chrominance signal that produces by said chroma separator; To have

Second analog to digital converter that the said colored subordinate carrier chrominance signal that said downward conversion device is produced according to said first oscillator signal is carried out digital processing.

47,, wherein saidly read address producing device and comprise as the video processing circuit of claim 38:

Provide the said read address counter of reading the address according to second oscillator signal;

To the said address decoding of reading, and provide indication to receive second code translator of the second decoder signal of a said particular address reading the address;

Produce second comparison means of second error signal of comparative result between said synchronizing signal of indication and the said second decoder signal;

Second low-pass filter to the said second error signal filtering with second time constant; And

Produce the device of said second oscillator signal, the frequency of oscillation of this signal is higher than the frequency of said synchronizing signal, and its phase place is subjected to control through said second error signal of the said second low pass filter filtering.

48, as the sharp signal processing circuit of looking of claim 46, wherein said second time constant is basically than the longer duration of a horizontal scanning line.

49, as the video processing circuit of claim 40, also comprise:

To first analog to digital converter that carries out digital processing by the said first said vision signal of going into/going out earlier the memory reception earlier;

The maincenter carrier wave generating means of generation maincenter carrier signal;

According to said maincenter carrier signal with produce the down-converter of colored subordinate carrier chrominance signal by the said carrier chrominance signal that said tone separation apparatus produces; And

To the said colored subordinate carrier chrominance signal that produces by said downward conversion device carry out digital processing and provide this through the colored subsidiary signal of digital processing as by said second second analog to digital converter of going into/going out earlier the said carrier chrominance signal that memory receives earlier.

50, as the video processing circuit of claim 37, wherein said brightness processed device comprises:

By the said vision signal that is provided by said time base correction device is carried out the time filtering device that frame comb filtering produces first luminance signal;

Produce the spatial filter arrangement of second luminance signal by the said vision signal that is provided by said time base correction device being gone comb filtering;

Produce the motion detection apparatus that the motor message that moves in the said vision signal that provides by said time base correction device is provided;

Produce the kinematic coefficient generation device of kinematic coefficient according to said motor message; And

According to said kinematic coefficient, by said first luminance signal and second luminance signal are mixed the soft switch device that produces the output luminance signal.

51, as the video processing circuit of claim 50, wherein said luminance processor also comprises:

Produce the non-standard input detection device of the time base error of the said vision signal of indication greater than the non-standard input signal of a threshold value; And

According to said non-standard input signal, selectively one in the said motor message and fixed value are offered the multiplexing unit of said kinematic coefficient generation device.

52, as the video processing circuit of claim 51, wherein said non-standard input detection device is read the address and write address detects said time base error by more said.

53, as the video processing circuit of claim 50, wherein said luminance processor also comprises a motion process device, is used to transfer said motor message, and the said carrier chrominance signal that makes said chroma processor produce is staggered.

54, as the signal processing circuit of looking of claim 53, wherein said brightness processed device half said motor message is modulated into four phase carrier waves so that make sideband pour into the Fukinnki dead space.

55,, also comprise the adder that is used for carrier chrominance signal addition that modulated motor message and above-mentioned chroma processor device are produced as the video processing circuit of claim 53.

56, as the video processing circuit of claim 37, wherein said brightness processed device comprises:

Produce the kinematic coefficient generation device of kinematic coefficient according to said motor message;

According to said kinematic coefficient, by said first luminance signal and second luminance signal are mixed the soft switch device that produces the output luminance signal;

Produce the non-standard input detection device of the time base error of the said vision signal of indication greater than the non-standard input signal of a threshold value;

According to said non-standard input signal, will set first multiplexing unit of one first fixed value by the said motor message that said kinematic coefficient generation device receives for selectively;

Be used to modulate said motor message, the motion process device of the said carrier chrominance signal intermodulation that feasible and said chrominance processing arrangement produces;

Motor message and the said adder that mixes by the carrier chrominance signal of chrominance processing arrangement generation with modulation;

According to said non-standard input signal, the motor message of the said modulation that will be received by said adder is set second multiplexing unit of one second fixed value for selectively; And

Produce the device of the time base error of the said vision signal of indication greater than the identification signal of said threshold value, this identification signal will be mixed with said output luminance signal.

57, as the video processing circuit of claim 49, wherein said maincenter carrier wave generating means comprises:

Produce a stable oscillator of a stable sinusoidal signal; And

By said stable sinusoidal signal is mixed with the counter signals that is produced by said write address generation device, produce said maincenter carrier wave to the up conversion blender.

58, as the video processing circuit of claim 49, wherein said maincenter carrier generator comprises that generation is by the said sinusoidal tracing table of writing the said maincenter carrier signal of the counter signals addressing that the way address generation device produces.

59, a kind of video processing circuit is characterized in that comprising:

The time base correction device that the vision signal of the reproduction of temporary transient storage being read it again then according to synchronizing signal is carried out time base correction;

From the said vision signal that said time base correction device is read, produce the expanding unit of the luminance signal of restoring bandwidth;

The luminance processor that the luminance signal of said recovery bandwidth is handled;

Colourity/moved apart the device of motor message and carrier chrominance signal is provided from the said vision signal that provides by said basic means for correcting; And

To the upwards converting means of up conversion by the said carrier chrominance signal of said colourity/moved apart device generation.

60, as the video processing circuit of claim 59, wherein said brightness processed device comprises:

61, as the video processing circuit of claim 60, also comprise and detect the identification signal that is included in the said vision signal, and according to being set at the device of a fixed value by the said motor message that said kinematic coefficient detector receives to the testing result of said identification signal, the time base error during the said identification signal indication record in the said vision signal.

62,, also comprise the stable sinusoidal generating means that produces a stable sinusoidal clock signal that itself and said carrier chrominance signal is mixed by said upwards converting means as the video processing circuit of claim 59.

63, as the video processing circuit of claim 62, wherein said stable sinusoidal generating means comprises:

Produce a stable oscillator of a stable sinusoidal signal; And

By said stable sinusoidal signal is mixed in said time base correction device with the counter signals that is produced by a reading address generator, produce said stable sinusoidal clock signal to the up conversion blender.

64, as the video processing circuit of claim 62, wherein said stable forcing function generator comprises the sinusoidal tracing table that produces said stable sinusoidal clock signal, counter signals addressing in said write address generation device that this stable sinusoidal clock signal is produced by a reading address generator.

65, as the video processing circuit of claim 59, wherein said upwards converting means comprises:

Will be by said carrier chrominance signal and first blender that stable sinusoidal carrier multiplies each other of said colourity/moved apart device generation;

The pass filter device is shown off in first of the long-pending filtering that produced by said blender;

The colour burst strobe unit of the burst signal isolation in said the amassing will be included in;

Produce the comparison means of a said burst signal and a stable oscillator signal comparative result;

Compared result is carried out the low-pass filter of filtering;

Produce the voltage controlled oscillator of four phase oscillation according to comparative result through filtering;

Second mixing arrangement with said four phase oscillation mixing; And

By producing second band pass filter means that said stable sine carries filter to carrying out filtering by said second said four phase oscillation that mix.

66, as the video processing circuit of claim 59, wherein said time base correction device comprises:

Produce the write address generation device of write address;

The address producing device of reading of address is read in generation; And

According to the temporary transient said vision signal of storage of said write address and according to produced read the address provide deposit the vision signal of paying go into/go out earlier storage device earlier.

67,, wherein saidly go into earlier/go out storage device earlier to comprise as the video processing circuit of claim 66:

Receive first of said vision signal and go into/go out earlier memory earlier; And

Receive second of said carrier chrominance signal and go into/go out earlier memory earlier.

68, as the video processing circuit of claim 66, wherein said write address generation device comprises:

Produce first comparison means of said synchronizing signal of indication and first error signal of comparative result between the one first decoder signal of mediating a settlement;

To said error signal filtering have a very first time constant with a low-pass filter; And

Produce the device of said first oscillator signal, the frequency of oscillation of this signal is higher than the frequency of said synchronizing signal, and its phase place is controlled by said first error signal of the said first low-pass filter filtering.

69,, wherein saidly read address producing device and comprise as the video processing circuit of claim 66:

Produce the device of said second oscillator signal, the frequency of oscillation of this signal is higher than the frequency of said synchronizing signal, and its phase place is subjected to control through said second error signal of the said second low-pass filter filtering.

70, luminance processor is characterized in that comprising:

By vision signal being carried out the time filtering device that frame comb filtering produces first luminance signal;

Produce the spatial filter arrangement of second luminance signal by vision signal being gone comb filtering;

Produce the motion detection apparatus of the motor message that moves in the said vision signal of indication;

According to said motor message,, produce the soft switch device of the output luminance signal of record by said first luminance signal and second luminance signal are mixed; And

Produce the said non-standard input detection device of looking non-standard the input signal of the time base error in the sharp signal of indication.

71, as the luminance processor of claim 70, wherein said non-standard input signal indicates said time base error to surpass a threshold value.

72,, also comprise device with the said non-standard input signal of said output luminance signal one trace record as the luminance processor of claim 70.

73, as the luminance processor of claim 70, also comprise:

According to said non-standard input signal, will be set at first multiplexing unit of one first fixed value selectively by the said motor message that said soft switch device receives;

The motion process device that said motor message is modulated is so that produce the modulated motor message that is recorded on the recording medium;

According to said non-standard input signal, it is second multiplexing unit of one second fixed value that said modulated motor message is set up selectively; And

Produce the device of the time error of the said vision signal of indication greater than the identification signal of said threshold value, this identification signal is mixed the said output luminance signal of institute.